XI. Beiträge zur kenntniss der cyanursauren Salze

Abstract

XI. Beitrzge zur Kenntniss der cyannrsanren Snlze ; von Ad. Claus und 0. Putensen. U eber die Zusammeiisetzung der amethyst-oder pfirsichbliith-rothen Krystalle, deren Darstellung mittelst ammoniakalischer Kupferoxydliisung man als gebrauchlichste Reaction zum Nachweis der Cyanursaure anzuwendeii pflegt , lauten 'i2,02 Ol0 72,41 o .

The Cyanurate Ribbon in Structural Coordination Chemistry: An Aggregate Structure That Persists across Different Coordination Environments and Structural Types

“…Such a distortion of a complex by rotation of a ligand away from a symmetrical disposition can be characterized by an angular distortion parameter, which for the purposes of permitting a straightforward discussion of the systems under consideration, will be defined as follows. The angle between the metal-ligand bondsCu(1)-N(1) in Figure 1sand the external bisector of the angle C(2)-N(1)-C (6), serves as a quantitative indication of the distortion. The traditional term "misdirected valence", or MDV, could be used for the angular distortion parameter, although in this case the question of misdirected valence turns out to be more involved.…”

“…In some of the cases, cocrystallization of a neutral isocyanuratecontaining complex with a cyanurate salt (1), or of cationic isocyanurate-containing complexes with unligated cyanurate (2-4) has occurred. In one case (6) two different transition-metal complexessone of them with weakly, unconventionally ligated cyanuratessare found in the solid. In at least the cases in which weakly bound or unligated cyanurate moieties are present along with ligated cyanurate (1, 2-4, and 6), the overall stoichiometries and the bonding arrangements observed about the transition-metal centers are important for maintaining the integrity of the cyanurate ribbon.…”

“…Briefly, cyanurates of copper were prepared as long ago as 1847 . Later in the 19th century, cyanurates were reported for magnesium, manganese, cobalt, nickel, and zinc . Many of the same compounds were prepared more recently, from melts, and a crystal structure determination using photographic techniques was reported for the complex trans -[Cu(cyan-κ N ) 2 (NH 3 ) 2 ] …”

“…5 Later in the 19th century, cyanurates were reported for magnesium, manganese, cobalt, nickel, and zinc. 6 Many of the same compounds were prepared more recently, from melts, 7 and a crystal structure determination using photographic techniques was reported for the complex trans- [Cu(cyan-κN) 2 (NH 3 ) 2 ]. 8 Preparations and noncrystallographic characterization have been reported for cyanurates of nine other metals by Seifer and co-workers.…”

“…In the present study, nine complexes (1-9 throughout this report) of the polyfunctional ligand isocyanurate (cyan), which crystallize with a broad variety of structural types, are seen to possess a common aggregate structure, an unbounded onedimensional ribbon of cyanurates. All of the complexes are the products of relatively simple reactions, and the products characterized are, with one exception (6), the first and principal products isolated from their respective preparations. In some of the cases, cocrystallization of a neutral isocyanuratecontaining complex with a cyanurate salt (1), or of cationic isocyanurate-containing complexes with unligated cyanurate (2-4) has occurred.…”